The “Drink Mixer” Design Constraints

Project Success Criteria An ability to digitally mix audio and adjust individual levels An ability to digitally mix audio and adjust individual levels An ability to adjust individual equalizer settings for the input channel An ability to adjust individual equalizer settings for the input channel An ability to add an effect to a channel (i.e. delay / reverb) An ability to add an effect to a channel (i.e. delay / reverb) An ability to save and load scene settings (from flash or EEPROM) An ability to save and load scene settings (from flash or EEPROM) An ability to display amplitude of output signal An ability to display amplitude of output signal

Design Constraints Sample and Move values of 11 Faders for 8 Input Channels and Master Outputs Sample and Move values of 11 Faders for 8 Input Channels and Master Outputs Managed by Atmels and updated / scanned by Primary Microcontroller Managed by Atmels and updated / scanned by Primary Microcontroller Interface 8 A/D Inputs on one I2S Bus and process for output with DSP Interface 8 A/D Inputs on one I2S Bus and process for output with DSP Update DSP parameters based on user interface changes Update DSP parameters based on user interface changes

Micro-controller 3 Microcontrollers ATMELs for Fader Control and Rotary Pulse Monitoring ARM9 for Main Display Interface and monitoring of ATMELS. Also used to update settings on DSP. DSP Microcontroller for Audio Mixing / Processing

Primary Micro-controller Hammer ARM9 (200MHz) Hammer ARM9 (200MHz) I2C interface I2C interface 2 SPI Interfaces 2 SPI Interfaces Video Interface Video Interface 2 USB Channels 2 USB Channels 30 GPIO Pins 30 GPIO Pins 32MB NOR Flash 32MB NOR Flash Atmel AT32AP7000 Series Atmel AT32AP7000 Series I2C interface I2C interface DSP Instruction Set DSP Instruction Set Video Interface Video Interface 16-bit DAC DSP Instruction Set 16-bit DAC DSP Instruction Set 160 GPIO Pins 160 GPIO Pins

Primary Micro-controller Chose Hammer ARM9 Chose Hammer ARM9 Lacks DSP Compared to AVR Lacks DSP Compared to AVR 16-bit DSP, we need 24-bit minimum 16-bit DSP, we need 24-bit minimum Past experience with Hammer Board. Past experience with Hammer Board.

Digital Signal Processor Analog Devices SHARC ADSP Analog Devices SHARC ADSP Serial I/O Busses 4 Serial I/O Busses SPI Interface SPI Interface 200MHz 200MHz 2Mb on chip SRAM 2Mb on chip SRAM Texas Instruments Tms320Dm355 Texas Instruments Tms320Dm355 ARM9 Core ARM9 Core 36KB on chip RAM 36KB on chip RAM 270MHz 270MHz

Digital Signal Processor Went with SHARC ADSP Went with SHARC ADSP Mb on-chip SRAM 2Mb on-chip SRAM Available resources for Analog Devices Available resources for Analog Devices

8 Channel Array ARM 9 µC Displa y USB (x2) Ethernet 3COM 3C19250 AXIS AX88772 Analog signal from Left Master Fader Analog signal from Right Master Fader A/D Input The Drink Mixer – Block Diagram 1.2 I 2 C (x2) GPO (x12) DSPADSP I 2 S (x3) MCLK Left out Right out Main Out D/A AUX 1 AUX 2 AUXD/A I 2 S (x3) Atmel µC 5 pushbuttons RPG Selector 3 LEDs Fader (Pot) & motor Pre-Amplifier 24-bit A/D Channel 0 GPI (x3) PWM H-bridge GPO (x3) GPO BalancedXLR Atmel µC 5 pushbuttons RPG Selector 3 LEDs Fader (Pot) & motor Pre-Amplifier 24-bit A/D Channel 7 GPI (x3) PWM H-bridge GPO (x3) GPO BalancedXLR